Sewing-machine shuttle



L. E. WEAVER SEWING MACBINE SHUTTLE Sept. 15, 1925. "1,553,419

Filed June 16, 1924 Patented Sept. 15, 1925.

T v K LUCIUSE. WEAVER, on EAST HAMPTON, oonnnc'rxoom, ass enon 'I'O SUMMIT THREAD "COMPANY, OF sass neneron, connections, A oonrona'ilon or ivxAInnf S W NG-MA N-E fiflUi- LE.

ename s 2 524? .9 Serial 7 9 3 useful Improyernents "in Sewing-Machine -Shuttles, of which the foiiowing is a specification.

This invention relates to a shuttle coinpri d 10 ns ne receiving cavity, a central' post in end of" a bobbincavity 011 which a bobbin in the cavity i sfotate d, and a thrust sunpqrtat the op ppsiteend of the cayityi A bobbin usually riety; is enclosed in the cavi end spaced from of the ready-wound yaty 'with its inner the head.

A shuttle embodying the invention is characterized hereinafter venting bin, and cop tube forming a from the cavity.

of the accompanying dra part of this specification) Figure 1. is a sile iew 0 by t 'i pi'ev a j n 'described anld claimed, for pmundesirably freerotat ion of the bob for partly ejecting the same, or a co nponent partthereqf,

in s forinin a w 11: 7

5 a shuttle body to which rny imp'roVed adjunct applicable Figure 2 is a section on urel.

gure 3 is an enlarged sectional View b n ness -pe ed fr wn shuttle body.

7 Figure 4 is a side yiew and Figure .5 an edge View of the bobbin-controlling ad unct of my inyent'on shown Figures 1 2 3, this being the preferred form.

i ur 6 is a; perspec ve v w" s w another vft'orni' of thebobbin-eontrolling adiu et.

n th d i s desi nat s a shut b y, w h ay ,ib f el ysfi ta f m and is provided withabearing' post 13, and

t a b n ie e n which said post eatend's. the cavity "fo'rnied in a p .1 of the-hen c nsnn am d tw n r il ii n this i ta s b bbin esthrust bearing for dut erf of' a bobbin.

The bobbin case is composed, as usual, of

an annular wall or cunbl,

.open at one end and closed atthe'o-ppositeend by a head 15,

8 o a central tubular post 16, to reeive the body post 13,

u porting and surrounding the inner end which is formed the hem usually,

- including a facing disk l erm n the in! ner side of the head; .The head andpthe body post may be provided with any suit;

toifore, with a 131 13 resilient'stop. sleeve 30.

6 is cproyided, as hereadapted to yieldingly er'nbrace thejpos't and be secured thereto by, friction. The' inlner end of the stop sleeyeisadapted to arrestia frictiondisk 31: and piieyent the re as ri t ol disk-tra th bIQ -b n as Wh a1 bobbin is withdrawn, 'the'disk'b an on the inner end otthe b'obbin.

The bobbin may comprise a coreor cop be us a ly f tap a winding 20 f t ead u v s l y lo d 2. theti be It is customary to in rposebetweenthe head 15 and the f ticti'ondisk 31a nes'ilient bobbin-controlling adjunct thefo'rn of a pr g y eldin y i iqp 'ingi he rotetiqn-of he b bb n, sa p ing ee i r filly On h "h a c o h lisl ante ex r in pressure on the bobbin thr o'ugh the'dish, to P the ut r d if th bqb in a e-i st th endithrust bearing 12a. i v

In carrylng out my nyention I pr oyide an proved adj 11mmh ch sup r pr to any heretofore used, so far asI ain'aware, and 1s characterized as next described.

. geld a iun t l lud f floa ing tion adapted to ub POI;

i d j k e: a mies ent b in l i i he res n iqo ti'q an qoni int y q y. t a r and. in fori'cing the bobbin toward the th bobbin wee- 'i ,7 v a 1 the. P PQf iiQQi embodiment, S QWI1 by l Fi ares' 1 m 5 inclusive the 'adjhnet includes a floating fiat sided hnli iiortioli 33 nrefer ably of thin sheet steel, inner genes of redial fingers 34 integral we the hub portion in' retarding rotat on of thehobb n bear and rotate on the {011 contactof the free ends of the and inclined from one side thereof to bear on the case head, and an outer series of resilient radial fingers 35 integral with the hub portion, alternating with the fingers 34, and inclined from the opposite side thereof of the hub portion to bear on the friction disk 31.

Said fingers collectively form resilient inner maximum projection to the outer end of the bobbin and thus permit the convenient grasping of said end in removing the bobbin from the tubular post. The radial arrangement of the fingers permits the inward springing thereof until they are in the same plane with the hub portion, so that the adjunct may be compressed to substantially the thickness of the hub portion. Provision is thus made for the cooperation of the adjunct with bobbins of various lengths and having a-wide range of difference in length.

Figure 6 shows an adjunct made of sheet metal and including a hub portion 33 of larger diameter than the hub portion 33, inner fingers 34L partially cut from the hub portion within the outer margin of the latter and projecting from one side of the hub portion, and similarly formed outer fingers 35 projecting from the opposite side of the hub portion, and alternating with the fingers 34.

In my copending application, filed Decem her 3, 1923, Serial No. 678,159, I disclose a bobbin-controlling adjunct interposed between two faces in a bobbin-receiving cavity,

a member of said adjunct being composed of an annular fiat-sided pressing disk having an extended area of contact with one of said faces, and a plurality of resilient fingers or tongues, integral with the disk and inclined from one side thereof to bear on the other of said faces. The drag or frictional resistance developed by the contact of the fiat side of said pressing disk with the face on which it bears, is; greater than that developed by the fingers or tongueswiththe other face, so that when the bobbin thread is relatively small or fine, there is not the desired delicacy of drag or opposition. to rotation of the bobbin.

It willbe seen that in the use of the im proved adjunct involved in this application,

the drag or frictional resistance developed by the contact of the outer resilient fingers with the head, is exactly equal to that developed by the contact of the inner resilient fingers with the disk 31, so that the drag or opposition to the rotation of the bobbin has a degree of delicacy which is desirable under certain conditions. The rotation-retarding effect of the improved adjunct is due wholly -to the sliding contact of the fingers with the head and disk, these being the only parts of the adjunct which contact with the head and disk. The fingers are simultaneously tensioned by the bobbin when the shuttle is in use, and their free ends are so spaced from the post that they contact with zones of the head and disk relatively near the outer mar-i which a bobbin in the cavity is rotatable; a

thrust support for the bobbin at the opposite end of the cavity, the inner face of said head and an end face of the bobbin being spaced apart within the cavity when the bobbin bears on the thrust support; a friction disk adapted to bear on the inner end of the bobbin; a facing for the face of the head opposite the friction disk; and an annular bobbincontrolling adjunct interposed between said head facing and disk, and composed of an annular floating hub of thin sheet metal, adapted to turn and move sidewise on the post, and two series of resilient fingers inte gral with the hub, inclined in'opposite direc tionsfrom the sides thereof, and having free ends arranged in two circular series in sliding contact with zones and disk, said fingers constituting the only parts of the adjunct which contact with the head and disk, so that the rotation-retarding effect of the adjunct on the bobbin is due wholly to the sliding contact of the fingers with the head and disk, each series of fingers exerting a drag equal to that exerted by the other series, the fingers being simultaneously tensioned by the bobbin when the shuttle is in use, and their free ends being so spaced from the post that they contact with zones of the head facing and diskrelatively near the outer margins thereof, whereby tipping of the bobbin on the post is'prevented.

In testimony whereof I have affixed my signature.

LUCIUS WEAVER,

of the head facing 

